Optical functional film, retardation film, composition for forming optical functional layer and producing method of optical functional film
AssigneeDai Nippon Printing Co., Ltd.
InventorsKeiji Kashima, Kenji Shirai, Takashi Kuroda, Takeshi Haritani
Life of this patent
Estimating the term…
Abstract
An optical functional film which exhibits excellent optical characteristics without using an alignment film, and having the excellent adhesion property between layers. The optical functional film includes: a substrate having a property as an optically negative C-plate, and an optical functional layer formed on the substrate and having a rodlike compound. The optical functional layer is formed directly on the substrate, and the rodlike compound forms a random homogeneous alignment in the optical functional layer.
Claims25
An optical functional film comprising:
- a substrate having a property as an optically negative C-plate, and
- an optical functional layer formed on the substrate and having a rodlike compound,
- wherein the optical functional layer is formed directly on the substrate, and the rodlike compound forms a random homogeneous alignment in the optical functional layer.
A retardation film comprising:
- a substrate having a property as an A plate or a B plate and a property as a negative C-plate, and
- a retardation layer containing a rodlike compound,
- wherein the retardation layer is formed directly on the substrate, and the rodlike compound forms a random homogeneous alignment in the retardation layer.
A composition for optical functional layer comprising:
- a rodlike compound, and
- a mixed solvent containing an alcoholic solvent and another organic solvent, wherein a content of the alcoholic solvent in the mixed solvent is in a range of 5 mass % to 20 mass %.
Dependencies are inferred from the claim text.